Mining-machine.



E. OTOOLE.

MINING MACHINE.

APPLICATION FILED JUNE 11, 1907.

Patented Aug. 24, 1915.

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E. OTOOLE. MINING MACHINE.

APPLICATION FILED JUNE If. I907.

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Patented Aug. 24,1915.

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MINING MACHiNE. APPLICATION FILE D JUNE H, 1907.

Patented Aug. 24, 1915 6 SHEETS-SHEET 4.

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III/I1 Patented Aug. 24, 1915.

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E. OTOOLE.

MINING MACHINE.

APPtICATION FILED JUNE II, 1907.

MINING MACHINE.

APPLICATION FILED JUNElh-1907.

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Patented Aug. 24, 1915.

EDWARD OTOOLE, 0F GARY, WEST VIRGINIA.

, MINING-MACIIINE.

Specification of Letters Patent.

Patented Aug. 24, 1915.

Application fl ed June 11, 1907. Serial No. 378,378.

T all who), it may concern Be it known that I, EDWARD OTooLE, of

Gary, in the county of McDowell and State of Vest Virginia, have invented certain new and useful Improvements in Mining-Machines, of which the following is a specification.

The object of this machine is to cut headings or passageways in mines, and when used in coal mines of which the output is small or crushed coal, to sub-divide and mine the coal, and thus save the expense of crushing.

Although the machine is designed with more particular reference to coal mining than to other uses, it is not limited to such particular use, but may be employed in any kind of mine or subterranean work where passages-are to be made through solid rock, mineral or other refractory material.

More especial objects. are to provide a machine which may be driven forward by-its own power as fast as the material in front of it is cut away; which can be operated so as to remove the material from the entire extent of the opposing material at the end of a passageway; which has self-contained conveying means for carrying away the broken material removed; and a simple arrangement of driving connections which can be independently thrown into gear so as to drive the several parts of the machine either independently or simultaneously.

Of the accompanying drawings,1*igure 1 represents a side elevation of the main part of a mining machine embodying the principles of my invention, in their preferred 1 form. Fig. 2 represents an elevation of the rear portion of the conveyer extendingaway from the machine, together with cars arranged to receive the material discharged from the conveyer. Fig. 3 represents a plan view of the part of the machine shown in Fig. 1. Fig. 4 represents a horizontal sectional view, on an enlarged scale, showing I in detail the mechanism for operating the cutting devices of the machine. Fig. 5 represents a sectional front elevation of the mechanism for propelling the machine forward. Fig. 6 represents a horizontal section'of the mechanism for driving the conveyer and car-hauling device. Fig. 7 represents a" detail plan View of the steering means for the machine. Fig. 8 represents a cross-section showing on a larger scale a de+ fected. Fig. 10 is a fragmentary elevation partly in section showingthe detachable connection between the frame of the machine OFFICE. l I

and the conveyor section thereof. Fig. 11

is an elevation of the guide for the cutter head steadying roll. Fig. 12 is an elevation showing in detail the cutter head frame. Fig. 13 is a detail elevation of one of the cutter chain guides.

The same reference characters indicate the same parts in all the figures.

The machine consists of a box-like frame composed of plates, straps, and stiflening angle irons. The plates 1 and 2 constitute the sides of the main frame, while the plate 3 constitutes the front thereof. The latter plate is bent approximately into a quarter circle and has secured to it at its opposite .side edges the plates 4 and 5 which inclose a space to receive part of the swinging cutter-head frame and the driving motor.

The machine is supported'by four traction wheels 6 which are secured upon the ends of axles 7 and 8.

Pivoted in the space between the plates 3 4 and 5 is a cutter-head frame 9 which consists of the side plates 10 and 11, a bar 12 connecting them at their rear ends, and-a plate 13 connecting the forward ends thereof. The pivotal axis upon which the cutter head is mounted is the back gear shaft 14 of a driving motor 15. The connection between the motor armature shaft and the shaft 14 is indicated in Fig. 3 by the dotted-line gearin 1 17. Y he forward part of the cutter-head frame is stifl'ened by vertical plates 18 and has at its upper and lower extremes the guides 19 and 20 for the cutters 21. The upper guide is formed by plates 22 and 23, and the lower one by platesQt and 25 held at the proper distance apart by guide'wheels hereinafter described, and plates 27 and 28. To the guides are secured respectively, the plates 29 and 30 which hold the wheels hereinafter described, which drive the cutters, which plates are fastened to center bars 31 and 32 respectively, while the latter are connected together by bolts 31 and fastened at their ends to the platel3 by bolts 31". The chain guides are, also detachably fastened to the plate 13 by angles 13 and lines of bolts 13".

Traiisver sel passing through the cutterhead is a she t 33 journaled in the sides of the cutter-head frame and passing between the center bars 31 and-32 which are spread apart for that purpose and also to receive a plate carries a sleeve 38 pivotally mounted on the shaft 14. Thecutter head is capable of oscillating about the center of shaft 14 by reason of the fact that these sleeves are free to turn.

The mechanism for .causing the cutter head to be oscillated and the cutters to be simultaneously driven is as follows: Keyed to the shaft 14 is a clutch 39 having pins or studs 40 adapted to enter spaces 41 in the web of the gear 37. This clutch is shifted axially by a cotter 42 which passes through a slot in the shaft and through a rod 43 entering the shaft endwise This rod is controlled by a' lever 44 which engages between collars or shoulders; 45 on the rod and so is enabledto move it endwise. On the outer end of the hub or sleeve 36 is cut, a small pinion 46 which meshes with a gear 47,

while on the outer end of shaft 33 is secured a crank arm 48. The gear 47 is mounted to turn upon a stud 49 carried in a plate 50 which is secured to the sleeve 35 and has secured to it a bearing 51 for the end of-shaft 33. Gear 47 therefore occupies an invariable relation with respect to the other parts carried by the cutter head, and swings with these parts about the shaft 14. A connecting rod 52 is attached to a crank-pin 53 on the ear 47 and to a wrist-pin 54 on the arm 48. Thereby an oscillation of shaft 33 is produced by the rotation of gear 47. Surround ing the sleeve 35 is the hub 55 of a gear segment 56, said hub' being secured to the side plate 4 of the main frame so as to be held stationary. Up.on the sleeve is a similar gear segment 57 fixed to the plate 5 of the frame. With these segments mesh coiiperating segments 58 and 59 secured to the shaft 33. Thus the oscillation given to shaft 33 by the connecting rod causes the segments 58 and 59-to roll upon the fixed segments and thereby oscillates the cutter head, swinging it up and down. The distance of the wristpin 54 from the shaft is governable by a screw 60, while the connecting rod is variable in length,.as shown in Fig. 1, so that both the distance of swing of the cutter head and the location of its path may-be varied at will. w

The cutters 21 are carried by endless chains 61 and 62 carried in the guides 19 and 20 respectively. Theformer passes around guide sprockets 63 at the ends of the guide, take-up wheels 64, and a drive wheel they are adjustable.

65. The other chain passes around similar guide and take-up wheels and a driving sprocket 66. To each of these driving sprockets is secured a bevel pinion 67, mesh ing with a bevel pinion 68 formed upon the end of a sleeve 68 Also formed upon this' sleeve is a gear 69 which meshes with'the gear 37 previously described' Thus themotor drives the cutter-carrying chains at the same time that it oscillates the cutter head.

' grooves, but oppositely inclined. The grooves will therefore cross each other, and also the same cutters in going down will cross the moves which they made coming up. Thereby the whole face of the mineral 1n front of the machine is'crisscrossed with grooves, and all the material is removed in a comparatively finely broken condition.

In order to take the thrust of the cutters there is mounted upon each of the cutter guides a roll which rests against the wall of the heading from which the cutters travel. That is, the thrust roll 70 on the upper chain guide bears against the right-hand wall of the heading becausethe upper series of cutters move to the left, while the roll 71 bears against the left-hand wall of the heading. These rollers are mounted yieldingly so as to give way when the width of the heading diminishes by reason of the cutters becoming worn away. If the rolls could not so yield, they would cause the cutter head to collapse.- As a pears in dotted'lines from Fig. 3, each rol is journaled in a fork .72 on the-end of .a rod 73, and is pressed outwardly by springs 74 surroundin the rods and abutting against the side p ates of the cutter-hea frame. fastened an angular guide 75 which has a; slot 75 to receive one end of the roll trunnion so as to keep the latter always radial to the path of the cutter head.

Beside each of the rolls is Each of the cutters is detachably mounted in the carrying chain, the latter being composed of alternate blocks and coupling linksin the former of which the cutters are placed and held by set screws. Looseness in the chain is taken up by adjustment of the guide wheels 64, the pivots of which pass" through slots 7 6 in the frame, in which slots Nuts 77 all pw the wheels to be clamped and held in adjusted.- position by friction.

On the end ofthe motor back gear shaft 14 is aqylocket 78 from which a chain 79 Yul-um by which cars are brought to and from the machine.

The conveyer is of the scraper type, and consists of a number of blades 82 of which the ends are carried by chains 83 and 84 which pass over driving sprockets 85 on the conveyer head shaft 86. The blades pass over a bottom plate 87 which at its forward end slopes nearly to the floor of the head- }ing and extends horizontally at its rear away from the main part of the machine. Over this plate the conveyer blades push the broken material, which is prevented from falling off-at the sides by angle irons 88 89 which form side walls. At the end of the conveyer the material is discharged, as

shown in Fig. 2, into cars 90. uuide wheels 91 at the rear of the conveyer and 92 on the front axle 8 hold the ends of the conveyer in place, while intermediate sprockets 93 and 94 take up the slack and the latter holds the forward part of the conveyer in position to scoop up the loose material.

The conveyer head shaft 86 is driven by the counter-shaft 81 through gears 95 and 96, of which the former is loose on the counter-shaft. A clutch 97 'splined upon the counter-shaft permits the conveyer drive to be thrown into and out of gear when desired. This clutch is controlled by a hand lever 98.

The material broken and cut away from the end of the heading falls in a loose mass at the bottom, as shown in Fig.1. nt order to push this out of the way of the wheels, plows 99 which run close to the floor of the heading are looselyengaged with the forward wheels by clips 100 and guards 1016K- tending around the wheels and fastened at their ends to the frame. These plows clear a path for the wheels, pushing the material to either side. The latter is gathered toward the center of the machine by inclined scrapers 102 at the sides thereof.- These of the head. If such an arrest should take 55 place, the scrapers would act as toggles to force the sides of the machine together. The outer ends of these scrapers are curved to conform with the curvaturebetween the bottom and side walls of the passages. lhe lower end of the con\'c. \'cl' guideway is formed by a plank l0 -lhinged to the lower end of plate 87 by hinges 10 1 and held by bolts 105 which arc connected to studs pass-' ing'throuu'h the hearing boxes 106 of the scrapers are pivoted at their inner ends by' be raised in the guides 107 so as to raise the plank Y101 and conveyer clearof the heading floor.

The rear end of the conveyer .guide or trough is vertically adjustable by means of the pivot pin 108 and screw 109'. At this point the conveyer trough is made in two parts which are pivoted together andhave ears 110 111 through which the screw 109 passes. This adjustment is provided for use in following dips and rises. The conveyer can be taken apart at this point by simply removing the screw 109 and drawing out the coupling pin 108. A disconnection can also be made between the conveyer section 112 and the main part of the frame at the point 113, as the side-plates of said conveyer section and frame are provided with flanges 112 at their meeting edges, which are connected together by detachable fastenings such as bolts 112*. Thus the machine may be made more readily portable for transportation to different parts of a mine.

In order to drive the machine forward while the cutting is taking place, there is provided upon the gear wheel 96 previously described, an eccentric crankpin 11 1 to which is pivoted a connecting rod 115. The latter has a slot 116 in its end through which passes a pin 117 on a plate 118 looselysurrounding a longitudinally extending shaft 119 (see Fig. 5). Pivoted in the plate 118 are pawls 120 and 121 adapted to engage a ratchet wheel 122 keyed to theshaft 119. The latter carries upon it a worm 123 meshing with a. worm wheel 124 on the rear axle 7 of the machine. ()n the end of this axle is a synocket wheel 125 fron which extends a chain 120 passing about a sprocket 127 on the forward axle 8. As the driving wheels (3 are keyed or fastened byset screws to the axles, they are thus all driven in unison.

'Tl1e pawls 120 and 121 have square holes through which passes a squared pin 128 by which they are pivoted to the plate 118. The pin 128 is loose enough to allow one pawl to rest against the end of a tooth, while the other is in the space between two teeth. The toes of these pawls are separated fronr each other by a distance which is an -desired to stop the forward movement of the machine, the pawls may be thrown back out of engagement with the ratchet. lhe machine may be fed forward simultaneously with the cutting action or indepe dently after a out has been made by mani i tlation of the clutch 39 and the pawls, according to circumstances.

Loosely mounted on the rea'r axle is a rope or cable drum 129 which is driven at will by "'elutch 130 thrown intoand out of connedthe eounter-shaft m through aclut'cli13O splined to the shaft, a sproeket 131 loose thereon, chain 132,, sprocket 133, and gears 134 and 135. The latter is fastened to the. drum 129 and the former to astud shaft on which the sprocket 133 is secured. The

'- these wheels is pivoted ona pin 140 carried ill "side or the other 0 the passage.

in bars attached to T -rods which have round screw-threaded shanks 143. The latter pasts loosely into the adjacent ends of piaes 13A and are adjusted to project the required distance therefrom by nuts lafg e'n; gaged with saidthread's and bearing against locki g plates 1&6 which pass across the ends or nit i pgs' 14 4. The1ocki1ig plates 146 are provided to prevent the huts being u 5 he .if a ion'. 6f th P p whi h to 'adjust them. These pipes pass through the niachine-andare threaded wheretliey pas s through the plate 1 and the nuts 1 17 seeured to these plates. By means of red s t iate the holes lie in nuts attached to hip'es, the, atter may be turned and so caused te move endwise acr0ss the mafchih,thereby settin the latter toward one i N .These steerin wheels are particularly useful to prevent the machine skidding to the low side of the heading when cutting on inclined seams.

Beside the traction wheels 6 are loose flanged wheels 1&9 which are adapted to run upbii tracks when the machine is transferred from one part of the mine to another. To permit such transfer the traction wheels are removed from the axles, the steeringwheels 139 removed by pulling them from their pipes lli, and the conveyer sections are aken apart and the cutter guides with their wheels and enter. bars removed, The wheels 1&9 can thenhe placed upon the track whlchis laid to, follow the machine closely be readily brought from one place to an ther. I p

the machine into the working place at the start it is run onthe'main track as far as the eitends, and then is run over the end 0ft 6 track, and dropping to the floor runs forward to the working place on traction wheels 6 under its own power, with e t vaity-preliminaries whatever except, slipping .t 'e traction wheels on the axlest 1; Heretpfo to the best of my knowledge; mining heve 'xiever been provided with a se of wheels that could run on the main "tracks. ,Machines have beenhuiltwithlarge wheels for running on the bottombf the heading, but in movingto another part ofthe heading, these machines have had to be,

apart and readily put together again' when desired. The construction previously depoint, and thus the conveyer can be taken scribed, of the cutter head, enables the latter .to be, also taken apart and assembled with a slight expenditure of time and labor. By

removing the bolts 31, 31 and13, the-chain guides with their bevel gears chains and sprockets may be taken apart without disturbing any adjustments. The power used is preferably electrical,

the motor being any of the well-known types adapted to give the necessary amount, of power. The motor is controlled by a con-' troller 150 of the ordinary type. It will be seen that the controller cranki151, the handle of link 137, and the levers 98 and A are all close together so that they can be handled easily and all-the mechanisms of the machinecontrolled by a single operator. 1

I claim I,

mines and dividing the material removed, comprising a swinging frame, means; for

1. A machine for cutting passage-ways in swinging said frame, cutting devices movable in said frame at the end thereoftransversely of the swinging movement thereof,

whereby to remove the material from the entire area of the end of the passage, and propelling mechanism'arranged and operated to advance the machine simultaneously with the removal of such materiah j 4 2. A machine for cutting passage-ways in mines and dividing the material removed,

comprising aswinging frame, imea'ns for swinging said frame, cutting devices movable in said frame at the end thereof transwhereby to remove the material from the entire area of the end of the passage, propelling mechanism arranged and operated to advance the machine simultaneously with the removal of such material andconveying means arranged to gather such material and convey it to an the rear. r

3. A machine for cutting passages n mines, comprising a cutter carrier, cutters held by and movable relatively to said carrier, means formoving the cutters in a pre elevated discharge point at;

determined direction in. the carrier, mechar.

. ter carr er, and mechanism for advancing saidsupporting means continuously without "ersely of the swinging movement thereof, n

limit, tiper etiiig in connection with said means and mechanism by which said "cut- :ters and carrier respectively are moved,and

at a rate proportional to the movement of the said'cutters and carrier.

,4. A machine for cutting passages in mines, comprising a cutter carrier, cutters held by and movable relatively to said carmeans and mechanism for driving said traction wheels at a rate which bears a predetermined ratio to the rate of movement of said cutters and carrier, whereby the cutter carrier is advanced simultaneously with the removal of material by the cutters.

5. A machine for cutting passages in mines, comprising a body frame, traction wheels supporting said frame, a cutter head movably mounted on said frame, cutting means carried by said cutter head, driving mechanism constructed and arranged to actuate the cutterhcad and cutting means so as to remove mineral from the face of the opposed body of mineral, and connections from said driving mechanism for driving said traction wheels, whereby the machine 1s propelled at a rate in proportion to the speed of movement of the cutter head.

6. A jmining machine comprising cutters arranged to travel in one direction, and

automatic means for shifting the cutters with a continuous back and forth movement bodily in an intersecting direction, whereby they are caused to cut grooves inclined to both directions. I

7. A mining machine comprising a cutter head, cutters guided thereby to travel in one direction across the face thereof, and automatically acting means for moving the cutter head continuously back and forth in a different direction at the same time, Whereby a resultant movement isigiven the cutters which is inclined to both directions. c 8. A mining machine comprising a cutter head, a plurality of connected cutters arranged and guided to travel in line across the face thereof, and means for simultaneously moving the cutter head transversely to the line of travel of the cutters, whereby the latter are caused to cut inclined parallel grooves in the opposing wall against which they are caused to act, said means being constructed to cause reversal of the cutter head automatically at the end of each of its movements. y

9. A mining machine comprising a cutter head, a lurality of cutters connected and arrang" to travel in two oppositely-movin lines across the face of the cutter head, and means for shifting the cutter head transversely to the movement of the cutters and simultaneously therewith, whereby 'intersecting inclined grooves in parallel series are cut, combined with automatically acting means for driving the machine ahead as the material is cut away, and means for moving the out material out of the way of the advancing machine.

10. A machine for cutting headings in mines, comprising a cutter head pivoted on. a horizontal axis and extending the full Width of the heading, means for swinging the head vertically back and forth about said pivot, and automatically reversing its motion .at the end of each swing, and a series of'cutters extending in line across the face of the head and connected to travel transversely to' the movement of the head.

11. A mining machine comprising a main frame, a cutter head mounted to swing pivotally in said frame, a driving motor, connections including. a constantly rotating crank and a connecting rod, connected 'to said cutter head, whereby the head is caused by said motor to move back and forth about its pivot, and to be stopped and started gradually at each reversal, and cutters actu-. ated by said motor to travel upon thehead.

12. A mining machine comprising a main frame, a cutter head mounted to swing pivotally in said frame, cutters mounted to travel on said head and projecting therefrom in position to'cut away material opposed thereto, a driving motor, and connections driven by the motor whereby the latter may drive the cutters, and driving connections for simultaneously oscillating the headwith approximately harmonic motion.

13. A mining machine comprising a main frame, a cutter head mounted to swing pivotally in said frame, cutters mounted to travel in guides in said head, a motor, a gear fixed concentrically with the pivotal axis of the head, a gear rotatably mounted on the head in mesh with said fixed gear, and connections driven by the motor for turning said rotatable gear at alternately.

increasing and diminishing speeds and thereby swinging the head back and forth with approximately harmonic motion.

14. A mining machine comprising a main frame, a cutter head pivotally connected to said frame and having cutter guides, connected'series of cutters mounted to travel in said guides transversely to'the motion of said head about its pivot, a stationary gear element, a rotary gear element -meshing therewith and carried by the head, and means forcontinuously oscillating said latter gear elementwith alternately accelerating and diminishing speeds, whereby the head is swung automaticallyback and forthand gradually'stopped and started at each reversal of its motion.

head pivotally mounted thereon and a connectedi-series of cutters arranged to: travel in- 15. A mining machine comprising a main frame, a cutter head pivotally connected to said frame and havingcutter guides, con.-

nected series of cutters mounted to travel in said guides transversely to the motionof said head about its bi vot, a stationary gear element. fastenedv to said main frame concentrically with the pivot of said head, rotary gear element meshing therewith and carried by the head, and means tor continuously oscillating said latter gear element at a diminishing rate, of speed as. it approacheseaoh point. of reversal, whereby the v heads-is swung back and forth automathcally and gradually started and brought to rest in. each direction.

16. In a. mining machine having a cutter said head transversely oi the pivotal: motion thereof, a. stationary gear element concentric with the pivot of said head, a movable 'gear element meshing therewith and mounted piw otally on the cutter head, a, rotary driving: crank, and a connecting rod joined with said i crank and with said movable gear element so as to oscillate the latter, whereby said element is-causedto roll back and forth on the stationary gear element and correspondingly swingthecutter head.

17. In a mining machine having a cutterhead pivotally mounted thereon and a con..- nected series of cutters. arranged to travel in said head transversely of the pivotal motion thereof, a stationary gear element concentric with the pivot of said head, a mo able gear element meshing therewith and mounted pivotallly on the cutter head, a rotary driving crank, a connecting rod oined with said if crank and with said movable gear element so as to oscillate the latter, whereby said element is caused to roll back andforth on the stationary gear element and correspondinglyswing the cutter head, and. adjustments for shifting the positions in which the motion of the head is reversed and forvaryii-lgthc amplitude of its oscil-latimis,v

18. In a machine having a cutter head pivotally mounted thereon and a con- 'nected series of cutters arranged to travel in said head transversely of the pivotal motion thereof, a stationary gear-element concentric with the pivot of saidhead, a movable gear element meshing therewith and mounted pivotally on the cutter head, a rotary driving crank, aconnecting rod joined with said crank and with said movable gear element so as to oscillate the latter, whreby said element is.

caused to roll back and forth on the stationary gear element and correspondingly swing the cutter head, and independent ad ust merits whereby this amplitude of oscillation of the head may be varied, and whereby'the positions in which its motion is reversedv may be. shifted without changing theextent of its motion.

19. In a mining machine havinga cutter head pivotally mounted thereon and a connected sericsof cutters arranged to travel in said head transversely of the pivotal motion thereof, a stationary gear element concentric with the pivotof said head, a movable gear element meshing therewith andmounte-d pivotally on the cutter head, a rotary driving crank, and a connectingirod joined with Said crank and withsaid movable gear element-so as to oscillate; the latter, whereby said; element is caused to rollback and forth on the stationary gear element and correspondingly swi'n Ythe cutter head,,said rod ad'- element meshing therewith and mounted piv-" otally on the. cutter head, a rotarydrivin crank, a connecting rod oined w th crank,.'and an. arm with which said'rodisem gagged, connected to. said movable gear els. ment and having'agreater length than the driving crank, sothat the latter element is caused: to oscillate and rollback and forth on the stationary e1en1ent, correspondingly swinging the cutter head. v

21. In a mining machine, having a cutter head pivotally mounted thereon and a connected series of cutters arranged to; travel in said head transversely .of the ivotal motion thereof, a stationary gear ement concentric with the pivot of said head, a

movable gear element meshing therewith and mounted pivotally on the cutter head,

a rotary driving crank,'a connecting rod joined with said crank, an arm connected with said movable gear element, and a Wrist pin, carried by" said arm, with which said connecting ro is engaged, said pin being adjustable on the arm to vary its distance from the axis, whereby the arm and movable element may be oscillated in Varying degree and the cutter held correspondingly swung in apath of varyin extent:

22. A mining mac ine comprising a main.

frame, a cutter head frame, a shaft journaled in said main frame and upon which said cutter head frame is arranged to swing v pivotally, a motor carried by said cutter head frame connected :to drive said shaft',---a gear fixed tohthe main frame coraxially with said shaft, a shaft journal'ed in the cutter.

head'frame, a gear fastenedthereon iii-mesh "with 551 M gear, connections being the cutter head frame, and cutters,

-fnounted and caused to travel on said cutter head frame in directions transverse to the oscillations thereof.

23. A mining machine comprising a main frame, a cutter head frame, a shaft journaled in said main frame and upon which said cutter head frame is arranged to swing pivotally, a motor carried by said cutter head frame connected to drive said shaft, a gear fixed to the main frame co-axially with said shaft, a shaft journaled in thei cutter head frame, a gear fastened thereon in mesh with said fixed gear, driving connections between the motor and said last-named shaft for oscillating the latter and thereby swinging the cutter head frame,:adjustable to var the position and length of swing thereo and cutters mounted and caused to travel on said cutter head frame in directions trans-- verse to the oscillations thereof.

24. A mining machine comprising a main frame, a cutter head frame, a shaft journaled in said main frame and upon which saidcutter head frame is arranged to swing pivotally, a motor carried by said cutter head frame connected to drive said shaft,

a gear fixed to the main frame co-axially with said shaft, a shaftjournaled in the cutter head frame, a gear, fastened thereon in mesh with said fixed gear, driving connections between the motor and said lastnamed shaft for oscillating the latter and thereby swinging the cutter head frame, endless cutter carriers mounted to travel in guides in the cutter head frame, drivers therefor, and a gear loosely mounted on the last-named shaftv driven by the motor for actuating the drivers.

25. A mining machine comprising a main frame, a cutter head frame, a shaft journaled in said main frame and upon which said cutter head frame is arranged to swing pivotally, a motor carried by said cutter head frame connected to drive said shaft, a gear fixed to the main frame co airially with said shaft, a shaft journaled in the cutter head frame, a gear fastened thereon in mesh with said fixed gear, cutter carriers mounted to travel in saidcutter head frame, gearing for driving the same, and gears loose on the motor-driven pivot shaft and engageable therewith, connected respectively with the second shaft and the cutter drive, forvcausing the cutter head frame and cutters to be moved simultaneously.

26. A mining machine comprising a main frame, driving wheels on which the same is supported, a pivoted cutter head frame arranged to oscillate up and down, cutters mounted to travel therein transversely to the direction of oscillation thereof, a motor, and independently. disconnectible driving connections between the motor and the driving wheels and thecutter head, whereby the-ma-- chine may becaused to cut and to be advanced at the same time "or independently, at will.

27. A mining machine comprising a main frame, a back-and-forth moving cutter head, cutters carried by said'head and movable -transversely of. the movement thereof,

wheels supporting said frame, a driving motor, connections operated by saidmotor for moving said cutter head back and forth, means for moving said cutters on the head also operated by said motor, and slow speed gearing 'driven by the motor for turning said supporting wheels and advancing the machine.

28. A mining machine comprising a main frame, a back-and-forth moving cutter head, cutters carried by said head and movable transversely of themovement thereof, wheels supporting said frame, a driving motor, connections operated by said motor for moving said cutter head back and forth, means for moving said cutters on the head, also operated by said motor, a worm wheeleonnected to said supporting wheels, a worm meshing therewith, and ratchet and pawl mechanism operated by the motor for rotating said worm and thereby driving the machine at a slow speed. 1

29. A mining machine comprising a main frame, a back-andforth moving cutter head,

veyer arranged to travel close to the ground andiupward and rearward from the machine, for carrying away the material dislodged by the cutters. l

30. A mining machine comprising a main frame, a back-and-forth moving cutter head, cutters carried by said head and movable transversely of' the movement thereof, wheels supporting said frame, a driving motor, connections operated by said motor for moving said cutter head back and forth, means for moving said cutters on the head, also operated by said motor, by which the material opposed to the machine is cut and broken away over its entire ei'tent, driving connections between the motor and supporting wheels by which the machine is driven forward at a, slow speed as the cutting progrosses, plows arranged in advance of the forward wheels .to displace the loose mate rial from in front of the same, a conveyor arranged with its forward end near the ground and traveling upward and rearward from the machine for removing the loose material, and a scraper for gathering the axiallywith said drive shaft, a counter shaft journaledin said cutter head, gear segments secured thereto, stationary gear segments to the mainframe coaxialiy With the drive shaft, mechanism actuated by the drive shaft arranged to oscillate the counter Shaft. and thereby swing the cutter head, an

endless chain carrying cutters along the for- 15 Ward end of the cutter head, a driving spmcket for said chain, intermeshing bevel gears respectively fixed thereto and journaled on the head, and gearing between said drive shaft and said bevel gears, whereby 20 the latter are operated and the chain caused t0 travel.

In testimony whereof I have affixed my signature, in presenceof two Witnesses;

I EDWARD OTOOLE.

Witnesses vL. E. Woons, AMANDA E. SHELBURNE. 

